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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_typetraits.reference.conjunction"></a><a class="link" href="conjunction.html" title="conjunction">conjunction</a>
</h3></div></div></div>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span><span class="special">...</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">conjunction</span><span class="special">;</span>
</pre>
<p>
        <span class="bold"><strong>Inherits:</strong></span> Inherits from the first type
        <code class="computeroutput"><span class="identifier">U</span></code> in the list for which
        <code class="computeroutput"><span class="keyword">bool</span><span class="special">(</span><span class="identifier">U</span><span class="special">::</span><span class="identifier">value</span><span class="special">)</span></code> is <code class="computeroutput"><span class="keyword">false</span></code>,
        or the last type in the list if there is no such type. If <code class="computeroutput"><span class="keyword">sizeof</span><span class="special">...(</span><span class="identifier">T</span><span class="special">)</span></code>
        is <code class="computeroutput"><span class="number">0</span></code> then inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
      </p>
<p>
        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">conjunction</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
      </p>
<p>
        <span class="bold"><strong>Compiler Compatibility:</strong></span> All current compilers
        are supported by this trait. In the absence of variadic-template support,
        <code class="computeroutput"><span class="identifier">conjunction</span></code> has only 2 parameters.
      </p>
<p>
        <span class="bold"><strong>Examples:</strong></span>
      </p>
<div class="blockquote"><blockquote class="blockquote"><p>
          Given: <code class="computeroutput"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">int</span> <span class="identifier">N</span><span class="special">&gt;</span> <span class="keyword">struct</span> <span class="identifier">Int</span> <span class="special">{</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keyword">int</span> <span class="identifier">value</span> <span class="special">=</span> <span class="identifier">N</span> <span class="special">};</span></code>
        </p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
          <code class="computeroutput"><span class="identifier">conjunction</span><span class="special">&lt;&gt;</span></code>
          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
        </p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
          <code class="computeroutput"><span class="identifier">conjunction</span><span class="special">&lt;</span><span class="identifier">Int</span><span class="special">&lt;</span><span class="number">1</span><span class="special">&gt;</span> <span class="special">&gt;</span></code>
          inherits from <code class="computeroutput"><span class="identifier">Int</span><span class="special">&lt;</span><span class="number">1</span><span class="special">&gt;</span></code>.
        </p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
          <code class="computeroutput"><span class="identifier">conjunction</span><span class="special">&lt;</span><span class="identifier">Int</span><span class="special">&lt;</span><span class="number">1</span><span class="special">&gt;,</span> <span class="identifier">Int</span><span class="special">&lt;</span><span class="number">2</span><span class="special">&gt;,</span>
          <span class="identifier">Int</span><span class="special">&lt;</span><span class="number">3</span><span class="special">&gt;</span> <span class="special">&gt;</span></code>
          inherits from <code class="computeroutput"><span class="identifier">Int</span><span class="special">&lt;</span><span class="number">3</span><span class="special">&gt;</span></code>.
        </p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
          <code class="computeroutput"><span class="identifier">conjunction</span><span class="special">&lt;</span><span class="identifier">Int</span><span class="special">&lt;</span><span class="number">1</span><span class="special">&gt;,</span> <span class="identifier">Int</span><span class="special">&lt;</span><span class="number">0</span><span class="special">&gt;,</span>
          <span class="identifier">Int</span><span class="special">&lt;</span><span class="number">3</span><span class="special">&gt;</span> <span class="special">&gt;</span></code>
          inherits from <code class="computeroutput"><span class="identifier">Int</span><span class="special">&lt;</span><span class="number">0</span><span class="special">&gt;</span></code>.
        </p></blockquote></div>
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